"In response to your request, the Congressional Budget Office (CBO) has updated the information in its June 2011 report 'A Description of the Immigrant Population: An Update'. The data and time available have allowed for updating 15 of the 20 exhibits contained in that report and adding one new exhibit. Those exhibits that could be updated in their entirety have been, and a few others have been updated partially. In a few instances, the period covered was altered to focus on the span since the previous report. CBO's updated exhibits regarding the immigrant population are attached to this letter, along with a list of the agency's recent reports and selected recent cost estimates for legislation related to immigration."
Congressional Budget Office: http://www.cbo.gov/